Question 82271
The problem says "Identify each statement as an equation or an expression. If it is an equation, slove it. If it is an expression, simplify it."
:
Remember an equation has to have an "=" sign, otherwise it's an expression
:
A: 3x - 82 + 53; an expression
3x - 29; simplified
:
B: 3x - 82 = 53; an equation
3x = 53 + 82; add 82 to both sides
3x = 135
x = 135/3; divide both sides by 3
x = 45
:
C: 12 - 5x = -18; an equation
-5x = -18 - 12
5x = 18 + 12; multiplied by -1 to get rid of the negative x
5x = 30
x = 30/5
x = 6
:
D: 12 - 5x - 18; an expression
-5x - 6
:
E: 12 = 5x - 18; an equation
12 + 18 = 5x; added 18 to both sides
30 = 5x
30/5 = x
6 = x
:
F: 6 - (x-2); an expression
6 - x + 2; removing the brackets with a neg in front changes the signs
-x + 8